[Pharo-users] Re: Updating a Form after changing pixel values

Hi Mikael If my understanding is correct, you're using SpImagePresenter to display a Form.  You then have made some changes to  the Form and you want to show its new face.  Why don't you set the image again in your presenter ? Something like `image image: yourUpdatedForm`. You can even update the Form of your presenter directly like: `image image: (image image pixelValueAt: 10@10 put: (image image  pixelValueFor: Color red))` image being an instance of SpImagePresenter. Renaud Mar 7, 2025, 13:53 by mikael.svane@fridhem.org:

I have a Form where I change pixel colours using Form>>pixelValueAt:put:. The Form exists inside an SpImagePresenter. After having changed the pixels, I want to redraw the Form in an #updatePresenters method to show the changes, but I haven’t been able to figure out how to do this. If I inspect the Form it is clear that the pixels have been changed, so the problem is in the #updatePresenters mwthod. I have tried different variations on this theme without success:

 

updatePresenter

                           | canvas |

                           “Get the canvas of the Form:”

                           canvas := imagePresenter image form getCanvas.

                          

                           adapter widget drawSubmorphsOn: canvas

 

Any suggestions would be very welcome.

 

Kind regards,

Mikael